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The life span of a battery is normally distributed, with a mean of 2500 hours and a standard deviation of 50 hours. What percent of batteries have a life span that is more than 2590 hours?
A social psychologist has developed a test measure gregariousness. The test is normed so that it has a mean of 70 and a standard deviation of 20, and the gregariousness scores are normally distributed in the population of college students used to ..
Calculate the correlation between decorating and Christmas enjoyment - Maximize Wayne's studying effectiveness.
A system consists of five identical components connected in parallel. Determine the reliability of the components such that the system reliabilty is 97%.
If all samples of size 64 are drawn, mean of sample according to Central Limit Theorem is 100.
What is the probability that an individuals clotting time will be more than 3 seconds and less than 11? Assume a normal distribution
Construct a sample space using a tree diagram - Which of the following three sets of probabilities are inappropriate because they violate a basic rule of probability
You wish to find out if negative relationship exists between amount of bottled water someone drinks and their water bill. Create a prediction model, if suitable.
The data (in milliamps) are shown below. Using the .05 level of significance, are there any differences in the three categories.
Suppose that the thermometer readings are normally distributed with mean of 0° C and a standard deviation of 1.00° C. A thermometer is randomly selected and tested.
What additional strategies (up to 3) you would propose that may increase validity of the findings.
To find out the alternate hypotheses also critical value. A truck dealer claims where a new model will give trouble free service for at least 15,000 miles.
The drug Ancrod was tested in a double-blind clinical trial in which subjects who had strokes were randomly assigned to get either Ancrod or a placebo.
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